How to measure the quality of thermal resistance? Common fault analysis

The measurement of thermal resistance is a crucial task. When using thermal resistors to measure temperature, we need to know how to correctly test their performance and how to analyze common faults. This article will focus on the methods of thermal resistance measurement and fault analysis.

1、 Measurement method of thermal resistance

Check the connection line

Firstly, check if the circuit connecting the thermal resistor is correct. When measuring, the correct matching cable should be used and its connection should be checked for correctness.

Check the electrical performance of the thermal resistor

Secondly, check whether the electrical performance of thermal resistance is normal. Check whether the resistance value of the thermal resistor is within the required range using a multimeter at room temperature. If it is within the specified range, it indicates that the circuit connection is normal. Before using a thermal resistor, it is important to thoroughly inspect its electrical performance.

Measurement of thermal resistance temperature response

Next, measure the temperature response of the thermal resistor. In practical applications, we should measure the response of thermal resistors at various temperatures. This can be achieved by placing thermal resistors in different temperature environments and using digital thermometers or thermal resistors.

Common problems and analysis of thermal resistance

Circuit connection failure

Circuit connection failure is one of the most common faults in thermal resistors. When using a thermal resistor, the cable connector may become loose, leading to connection failure. In this case, check that the connections are tight and secure with Electrical tape.

The sensitivity of thermal resistors gradually decreases over time, which may be caused by thermal resistor aging. In this case, it is recommended to replace the thermal resistor.

The thermal resistor may be mechanically damaged, dropped or otherwise physically damaged, resulting in the thermal resistor not functioning properly. In this case, it is recommended to replace the thermal resistor.

Affects operating temperature

Finally, the performance of the thermal resistor may be affected by the operating temperature. If the working temperature changes too much, the response time of the thermal resistor may slow down or be incorrect. In this case, measures should be taken to ensure stable operating temperature, such as applying a temperature controller.

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